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bekas [8.4K]
3 years ago
6

In simplest form, what is (4/5)²-2/5​

Mathematics
1 answer:
Leviafan [203]3 years ago
6 0

Answer:

0.24

Step-by-step explanation:

4/5=0.8

0.8 to the power of 2 or 0.8*0.8= 0.64

2/5=0.4

0.64-0.4= 0.24

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What numbers? I need to know that to answer :/
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The picture below shows Annie and her younger brother Tommy’s money. They want to combine their money to buy something together.
Inga [223]

Answer:

$5.47

Step-by-step explanation:

Given data:

Annie has 4 dollar , 11 dimes, 4 pennies.

Tommy has 3 dimes, 3 pennies.

To add the money, let us first convert dime and penny into dollar.

1 dollar = $1

11 dime = $1.1

4 penny = $0.04

3 dime = $0.3

3 penny = $ 0.03

Total money = Annie’s money + Tommy’s money

                     = $4 + $1.1 + $ 0.04 + $0.3 + $0.03

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So, they have $5.47 in all.

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4 years ago
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Triangle DEF (not shown) is similar to ABC shown, with angle B congruent to angle E and angle C congruent to angle F. The length
Bezzdna [24]

Answer:

Area of ΔDEF is 45\ cm^2.

Step-by-step explanation:

Given;

ΔABC and  ΔDEF is similar and ∠B ≅ ∠E.

Length of AB = 2\ cm and

Length of DE = 6\ cm

Area of ΔABC = 5\ cm^2

Solution,

Since, ΔABC and  ΔDEF is similar and ∠B ≅ ∠E.

Therefore,

\frac{Area\ of\ triangle\ 1}{Area\ of\ triangle\ 2} =\frac{AB^2}{DE^2}

Where triangle 1 and triangle 2 is  ΔABC and  ΔDEF respectively.

If two triangles are similar, then the ratio of the area of both triangles is proportional to the square of the ratio of their corresponding sides.

\frac{5}{Area\ of\ triangle\ 2} =\frac{2^2}{6^2}\\ \frac{5}{Area\ of\ triangle\ 2}=\frac{4}{36}\\ Area\ of\ triangle\ 2=\frac{5\times36}{4} =5\times9=45\ cm^2

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4 0
3 years ago
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Reduce To Simplest Form.<br><br>-1/4 - (-3/5) =​
mihalych1998 [28]

Answer:

Step-by-step explanation:

-1/4 - (-3/5) =

-1/4 + 3/5 =

-5/20 + 12/20 =

7/20 <==

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4 years ago
Which of the following represents the set of possible rational roots for the polynomial shown below 2x^3+5x^2-8x-20=0
olya-2409 [2.1K]
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factors of constant term (-20) = +/- 1, +/-2, +/-5, +/-10, +/-20 WE call these factors p.

factors of leading coefficient (2) = +/- 1, +/-2 (call these q)

then possible roots are p/q = +/-1/1, +/- 1/2 , +/- 5/1 , +/- 5/2 and so on.
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